On Sat, Feb 7, 2015 at 6:12 AM, Pat Erley <pat-lkml@erley.org> wrote:
> I'm seeing the message in $subject on my Xen DOM0 on next-20150204 on
> x86_64.  I haven't had time to bisect it, but have seen some discussion on
> similar topics here recently.  I can trigger this pretty reliably by
> watching Netflix.  At some point (minutes to hours) into it, the netflix
> video goes black (audio keeps going, so it still thinks it's working) and
> the error appears in dmesg.  Refreshing the page gets the video going again,
> and it will continue playing for some indeterminate amount of time.
>
> Kirill, I've CC'd you as looking in the logs, you've patched a false
> positive trigger of this very recently(patch in kernel I'm running).  Am I
> actually hitting a problem, or is this another false positive case? Any
> additional details that might help?
>
> Dmesg from system attached.

[ CC some mm folks ]

I have seen this, too.

root# grep "BUG: non-zero nr_pmds on freeing mm:" /var/log/kern.log | wc -l
21

Checking my logs: On next-20150203 and next-20150204.

I am here not in a VM environment and cannot say what causes these messages.

- Sedat -